"Could not find the authenticating server" While connecting to Paypal REST Api

As a test, we tried to do a simple GET to list the payments. /v1/payments/payment The login popup opens, and the login succeeds. But afterwards, Skuid is showing an error saying that it could not get the authenticating server together with the Token URL.

I think this happens, because the domain for Token and Auth Server are different (sandbox.paypal and api.sandbox.paypal)